Synchronizing system



I l Y l y 1,616,808 Feb. 8, 1927f E. E. KLEINSCHMIDT 1 SYNCHRONIZING SYSTEM Filed Oct. 20, 1919 lmng;

f tions being connected by line L. At the Patented Feb; s, 1927. UNITED STATES TENT ortica.

EDWARD EKLEINSCHMIDT, 0F BROOKLYN, NW`YRK, ASSIGNOR,"BY`MESNE AS- SIGNMENTS, TO MOBKRUM-KLEINSCHMIDT CORPORATION, 0F CHICAGO, ILLINOIS,

A CORPORATION OF DELAWARE'.

SYNCHRONIZING SYSTEM.

' Application mea october 2o,` 1919. serialfnaaane'zo. s

yThis invention more particularly relates to a system for synchronizing the speeds of the distributers at two'different stations 1n a printing telegraph system, or other apparatus. In the Baudet system of printing telegraphy, rotatable members or distributors are used at the stations ylzet'ween'whicli1ntelligence is to be communicated, andv 'in order properly to transmit the signals, it is necessary that the distributers rotate substantially7 in synchronism.

The present invention provides novel means for synchronizing the rotation of these rotatable members, in a simple and effective manner.

The accompanying drawing is a diagrammatic view illustrating one embodiment thereof in connection with a multiplex printing telegraph of the Baudet type.` The details ot the apparatus not shown in the drawing are WellV understood and old in the art.

A and-B indicate the transmitting and the receiving stations, respectively, of a multiplex printing telegraph system, the two sta- 'transmitting station A are located any desired number of transmitters, here shown as.

two in number, 12 and 13, corresponding in this case to two channels. which may be constructed as shown in the Patent No. 1,460,357, issued June 26, 1923. Brieiy, vit may be stated that each transmitter comprisesl setsl of movable contact tongues l2 and 13, which are vvibrated between stationary contact points electrically connected together by conductors 14, 15 and 16, 17, respectively, it being 'understood that a signal in the Baudot system comprises five electric impulses, the impulses being of opposite polarities and arranged sequentially in various combinations. A line battery 18 is connected at its middle point tol ground at 19, one pole ofthe battery being connected to conductors 14 and 1 7 of thetwo transmitters,

uhile the4 otherpole is connected to contacts 15 and 16. The movable Contact f tongues 12 and 13 are connected to line` L through distributer D, which is, as Well as the distributer at station B, shown -developed. The movable contact tongues 12 and 13 are connected to Contact segments 1, 2, 3,4 and 5. respectively, of ring. 2O of distributor D, the other ring 21 ofivhich may be continuous, as shown,rand connected `*to linel L, the two ringsbeing bridged by rotating brushi22. The selector magnets at the receiving station, corresponding in vnumber to the sets of contacts at the transmitting station, are represented by the'numerals 23 and 24.

V A polarized relay 25 isincluded in line*y i L at `station B, iti/being understood that a similar line relay, which is not here illustrated, is located at station A, theline circuit being grounded at19'vJ atstation B.. Armature 26 of polarized -relay 25, vibrates, 'in'rev sponse to reversals of rcurrent coming over the line, between contacts 27Jand 28, and is connected to solid ring 29 'of distributer D at station B; The various magnets of each ot the groups`23 and`24 are connected vto all ternate segments 1, 2, 3,'4'and 5 of ring30 of distributerxD", which segments correspond `in number to those of ringlj20 of distributer D at station A and are correspondinglyv numbered, kthe-intervening segments being indicated at 31, the two-rings 29 and 30 being bridged' by rotating brush 32. One set 8'0- of terminals ofthe magnets ofeach of the groupsl 23 and 24 are lelectrically connectedv together and arefconnected by conductors 33 f andf34. to 'contact points 27 land 28, respectively, and also to the opposite poles of local battery 3'5` at stationy B, whilev the opposite terminals of these magnets are connected to the respective segments `otl ring 41. u

A condenserl 36 tor'y bringing about the actuation of the correcting mechanism for the distributer at station Bis provided, one termma] of the condenser. being connected to armature 26 while .the other terminal is'conl nected to Winding 37 of a relay, indicated, 1n general, by the letter R, andwhich coni trols the operation ofthe correcting mecha- I `msm, armature' 26 thus controlling both the recelvingcircult, andthe correcting circuit through the same contacts.A The'other Aterminal of Winding 37 ig connected directly .to

contact point 27and through; battery 35` t0 contactCpoint 28, so thatv When the 'armature is move charged `by battery 35, and when 'moved against contactk 27, the condenser is' discharged, the charge and ydischarge taking into engagement with contact 28` as i shown 1n the "drawing, condenserV 36 -isplace at the moment of reversal of th line, i

impulses. Relayi R is preferably'plarized at N S. `Relay R is provided with an arrnature 38 connected to .battery 35 and contact 39 which is engaged by the armature.

Relay R controls the'actuation of operat-` ing magnet M which actuates the correcting arrangement for the distributer at B. Mag- Anet M is,also controlled by a member indicated, in general, by the character C, comprising a continuous ring 4 0'connected d1- rectly to/contact 39 o f relay R and a seg? mented ring 41, the two rings being bridged by rotating brush 42. Ring 41 is provided with a-plurality of segments, the alternate ones of which correspond in number and in position to thosey off-segmented ring 30 of distributer D, and which 'are electrically connected together and to one terminal of operating magnet Mkthe intervening'contacts being dead. For each of the segments 12, 3, etc. of the ring 20'at station D there are thus two segments on the ring 41 at stationD, one of which is included in'the local circuit of the operating magnet M and the'other of whic-h is a blankor dead contact. The other terminal of operatingmagnet M is connected by conductor 43 to one terminal `of battery 35. In'order tol prolong p the energization of magnet M, a locking circuit is provided, including an armature 44, a contact 45, which the armature engages,'and conductor 46, which is joined to the conductor extending from armature 38 to the Jbattery 35. Magnet' M actuates an armature 47 to the end of which arma-ture is pivoted pawl 48 which engages ratchet wheel 49, the movement of which corrects the speed of distributer D1. and synchronizes the movement thereof withA that of distributer D.` To the opposite endof the armature is connected lan arm 50 `which .opens the locking circuit of magnet M when the armature has completed the vmovement necessary to actuate the correcting wheel 49.

Suitable resistances, sucht-as 51. and 52, between contacts 27, 28, and the respective poles of battery 35, are provided.

A second balancing condenser 53 equivalent. to condenser 36, and al resistance 54 equivalent to the resistance of winding 37 of relay R, are preferably -provided and are connected to armature 26 and to contact 28.y

, The purpose of the condenser and the resistance is to maintain the circuit conditions of the selector magnets 23 and 24 the same underall conditions.

The operation, of the system embodying the present invention is as follows: u Brush` 22 aty station A, which may be termed'the correcting distributer, is rotated at substantially constant speed, and brushes 32 and 42 at station B, at which the correction Atakes place, and which-may be termed the corected distributer, also rotate at substantially constant speed, but at a speed Vwhich is slightly greater or slightly less, than distributer D', and assuming thata positive impulse is sent over the Aline, at the time brush 22 engages segment 1, armature 26`will be moved into engagement with contact point be closed through the 28 and a circuit will magnetat the left ofl group 23 throughsegment 1 of ythe distributer, armature 26, contact point 28 and battery 35. Thereupon, condenser 36 will becharged through a c'ircuit including armature 26, contact point 28, battery 35 and winding 37 of relay R. Correspondingly, when a negative impulse is sent over the line, armature 26 will bemoved against contact point 27, and condenser 36 will discharge through Winding 37, contact oint 27 and armature 26. Condenser 36 is, therefore, charged or discharged, a d wind- *mg 37 energized on each charge or yisc-barge of the condenser at each reversal ofthe line current, the armature being attracted," however, only at the charge or discharge, preferably discharge, because of the polarized core. The claims refer .to condenser current,l

and intend to cover the current both at charge and discharge.

' Now, when distributer D ris in synchro.-

ing the armature 38 being closed and 'againu opened, during normal operation, while the brush 42 is passing over oney of the blank segments of the ringr41. The distributer at station B, however, is running at a slight- *ly' greater speed than that at station A,

with the .result vthat ythe positionof the brushes on the distributer at station B, is gradually advanced with reference to the vbrushes at station -A and brush 42 will eventually -be` in contact with lone of the numbered segments when the reversal takes place. A circuit is then closed throughmagnet M, distributing vmember C Contact 39, armature 38 and battery 35', and the correcting "device actuated to bring the brushes at during normal operation, the brush of the mature 44, contact 45, conductor -lt and battery to prolong the energizatioii ot inag-` net M until the niovementdot patvl 48 and ratchet wheel 49 through armature 47 is completed in a direction to correct the posi-v tions, of the brushes at the receiving station.

4.its soon asarmature 47 has completed such movement, arm 50 pushes back armature all and thus opens the locking circuit of the magnet and restores the parts to normal position.

What I claim and dsire to secure by Letters Patent ot the United States is:-

l. In a telegraph system, two stations, a rotatable member at each ofv said stations, a line conductor connecting said stations, means for transmitting over the line inipulses of reverse polarity, a condenser lo'- cated at one of said stations and arranged to be charged and discharged in responseto the reversals of said inipulses,'a polarized relay included in thefcircuit of said condenser, a magnet controlled by said polarized relay for synchronizingthe speed of the associated rotatable member with that of the other, anda locking circuit for said magnet for prolonging ,the energizatioii thereof. l 2. In a printinfr telegraph system, a ro tary correcting distibuter, a rotary corrected distributer, means comprising an'electro-magnetic operating device .for correcting the .angular position ofsaid corrected distributer to bring the same intostep with the other, an electric circuit including said electro-magnetic device, a circuit-closer included in said circuit, said' corrected distributer comprising segments included in said circuit and blank 'segments over which,

corrected distributer passes during the time ofl closure of said circuit-closer, andmeans comprising a condenser 'included in the circuit' of said magnetfor momentarily energizingthe same on changes of line impulses.

v3. In a printing telegraph system, a rotary correcting distributer, a rotary corrected distributer, means comprising an electro-magnetic operating device for correctingthe angular position of saidcorrected` distributer to bring the same into step with the other, an electric circuit including said electro-magnet1c device, a circuit-closer 'included in said circuit, a polarized, relay for actuating said circuit-closer, and means 'for momentarilyoperating said circuit-closer in` response' to changes in line impulses coinprising a condenser included in circuit with i said polarized relay, said corrected distributer comprising segments included in said circuit and` blank segments over vvhich, during" normal operation, the brushl of the cor-` i'octed distributer passes during thetimeot'f closure otl said circuit-Closer; i u fl. In combination, two stati-ons, aline. connecting the same, impulse transmitting vmeans at one station, impulse receiving means at the other station, afpolarized relay in said'line, circuit closing means controlled by Said relay., a circuit inoliu'ling said circuit closing means, a second polarizedrelayqin said circuit responsiveto linev impulsesreceived by said. first polarized relay, a-second circuit. controlled by said second .polarized cuit adapted to establishv synclifronisni bct'ween said transmitting-and receiving means. Y

n 5. In combination, two stations@ `line con?, necting the "same, impulse transmitting means, at one station', impulse receiving means at the other station,-a polarized relay in said fline, circuit closing meanscontrolled` byl saidrelay, a circuit vincluding said circuit closing means, a 'condenser in *Saidv circuit adapted to be.- cliarged and dischargedV according to the closing and openingV ot said circuit through's'aid eircuitclosingmeans,aii second polarized relay in said circuitrespon- 1 y sive to line impulses received by, said iirst H i polarized relay, asecondy circuit controlled vby said second polarized relay, and aniopei-r ating magnet in said circuit adapted to establish syiichronismV between said transmitting and receiving means 7 6. Intcombinat-ion, necti'ng the same, vimpulse transmittingltivo stations, a line con-V y means at yone station, rimpulse 'receiving' means at' the other station, a polarizedv relay in said line, circuit closing means controlled by sardi-relay, a` circult includingsaid circuit closing means, a second polarized relay in said circuit responsive toline impulses receiv'ed by said firstpolarized relay, afsec- .ond circuit controlled by lsaid second polarized relay, an operating magnet in saidjcircuit adapted to'l establish.l synchronism between said4 transmitting and vreceiving means, and a locking circuit for saidyioperating magnet for prolongingthefenergization of saidl magnet untilgsynchronism between cuit adapted to'bev chargedand discharged according to the closing and opening'ofsaid circuit through said'circuit closingmean'sLa second polarized-relay in saidcircuit responsive to line. impulses received Lby `said -irst olarized relay, a second circuit:[controlledv y said' second polarized relay, an operating magnetl in said circuit radapted toestablislvi' MMJ s vnclironism between said transmitting and when said correcting mechanism is in operation.

y9. Aty system comprising apparatus for transmitting code combination of electrical' 20 conditions, Va rotary distributor for said ineilasos transmitting apparatus, a rotary7 receiving distributor, receiving apparatus controlled by said receiving distributor and selectively responsive to said conditions', correcting means operative only on the reception of certain of said conditions, and means operative on' the reception of the remaining ones of saidconditions to produce substantially the saine eectrical conditions in said receivingy apparatus as When said correcting mechanisin is operative.

10. Receiving apparatus comprising a line relay` a distributor, ya correcting magnetl for 4 said distributor, an .electro-magnet coacting With said distributor to control said correcting magnet, and a condenser charged and discharged continuously by the operation of said, relay independently of said correcting means.

EINVARD E. KLEINSCHMIDT. 

